Installation Guide

Table Of Contents
38
CRI 105 - STANDARD For INSTALLATION of RESIDENTIAL CARPET Copyright © 2015 by The Carpet and Rug Institute, Inc.
Definition of Terms
Term
Definition
Pattern skew
This is a distortion visible when the pattern on one side is slightly
ahead of the pattern on the other side. Skew, or bias, describes
pattern squareness.
pH
A value representing the concentration of hydrogen ions in gram
equivalents per liter used to indicate the acidity or alkalinity (base) of
a substance on a scale from 0 to 14 with 7 representing neutrality,
numbers less than 7 increasing acidity, and numbers greater than 7
increasing alkalinity. [Use distilled water for laboratory and field
testing for pH.]
Plasticizer
A substance incorporated into polyvinyl chloride polymer or other
polymers to increase flexibility and workability.
Power stretcher
A carpet tool used to stretch carpet. Consists of a pinned plate or
cotton head that grips the carpet, tubular extensions, a padded end
used to brace against an opposing wall or other structure (dead man),
and a lever system that multiplies the installer’s applied stretching
force.
Primer
A preparatory coating placed on a substrate or material to promote
adhesion and neutralize pH.
Riser
The upright part of a step between two stair treads.
Sealer
A product used to reduce the porosity of the substrate.
Seam
The joints or interface of two pieces of carpet by the use of various
securing techniques.
Seam adhesive
A specifically formulated adhesive for securing and protecting cut
edges of carpet to be seamed.
Seaming
Devices
Tools designed to melt seaming tape.
Seam peaking
The slight elevation of the taped seams which is a (usually renders the
seam more visible) result from power stretching of the carpet. For
additional information, refer to CRI Technical BulletinPeaking Seams
in Stretch-In Carpet Installations.
Seam sealing/
Edge sealing
Common term used to describe the application of seam adhesive to
secure and protect cut edges of carpet to be seamed from edge
raveling and delamination.